Question PSU tester shows yellow light for 12V and not lit up at all for -5V, all others are green ?

[miogpsrocks]

My computer speakers stopped working so I turned it off and moved it around a bit to unplug/replug the 3.5mm jack-plug for the speakers. However, the PC would not turn on after that. Also, my AC has been out for the past few days so the room is uncomfortably hot.

The computer is totally dead, and no fans turn on when the power button is pressed. I plugged in a power supply tester and it everything shows green except the 12v shows yellow and the -5V has no lights at all.

The PSU tester does not say anything about a green versus yellow light on it.

The PSU tester and paperclip test are able to get the PSU fan to turn on, but PC fans remain off. Any idea what might be going on here?
Thanks .

 

[Aeacus]

Full system specs, including PSU make and model (or part number) is? Also, how old the PSU is, and was the PSU bought new or used/refurbished?

The PSU tester

Make and model of that thing is?

Any idea what might be going on here?

With very limited info and 0 specs, my best guess is dead PSU. Probably dead everything, since when PSU goes "boom", it has magical ability to fry everything it is connected to, aka your whole PC.

 

[miogpsrocks]

Full system specs, including PSU make and model (or part number) is? Also, how old the PSU is, and was the PSU bought new or used/refurbished?


Make and model of that thing is?


With very limited info and 0 specs, my best guess is dead PSU. Probably dead everything, since when PSU goes "boom", it has magical ability to fry everything it is connected to, aka your whole PC.

I plugged in another testing device which gave me all the correct voltage readings, however it still would not turn on. I found a replacement power supply which was an identical one but new in the box. I replaced the power supply, and it is the computer turned back on.

So it seems like replacing the power supply solved the problem, but if the old power supply was bad, why did the testing device say it was good?

Is it possible for a power supply to read the right volts but still be bad? Maybe it can supply the right volts with a cheap testing device but under load, it fails?

 

[Aeacus]

Maybe it can supply the right volts with a cheap testing device but under load, it fails?

More like, in-spec voltages without any load, but once you put a load on it, it fails.

In a similar sense; assuming the car drives fine, just because engine turns on. But without ever doing the test drive.